Take-up tension for shuttles



Nov. 7, 1950 J. E. SEGEE ETAL 2,528,915

TAKE-UP TENSION FOR SHUTTLES Filed Feb. 7, 1948 2 Sheets-Sheet 1 INVENTOR3 43 42 JAMES E. SEGEE ATTORNEYS UILFR] D I GUSSELIN Nov. 7, 1950 555G515 ETAL 2,528,915

TAKE-UP TENSION FOR SHUTTLES I Filed Feb. 7, 1948 V 2 Sheets-Sheet 2 INVENTORS JAMES ESEGE'E HILFRH] J. GUSSELIN BY WW ATTORNEYS Patented Nov. 7, 1950 UNITED STATE TAKE-UP TENSION FOR S HUTTLES James E. Segee, Lawrence, and Wilfrid J. Gosselin, Methuen, Mass, assignorsto U. S. Bobbin & Shuttle 00., Providence, R. I., a corporation of Rhode Island- Application February 7, 1948, Serial No. 6,893

1 Claim. 1

This invention relates to loom shuttles of the automatic or self-threading type although it might be used with hand threading shuttles.

All shuttles have what is for convenience called a bobbin chamber in which there is a bobbin on which thread is wound and extending forward from this is a threading chamber from which there extends laterally an eye outlet passage at the end of which is an eye outlet, the thread unwinding from the bobbin and passing through the threading chamber thence usually around a vertical center pin or some other obstruction and out through the eye outlet passage and the eye outlet. I

Most automatic or self-threading shuttles include as part of their threading chamber, which is open at the top, a section in a metal shuttle block which shuttle block usually has some kind of nose or hook near the outward end of the threading chamber near the point of the shuttle and beyond this there is usually a thread groove in the wood. There is also a passage from this nose down and into the eye outlet passage and the eye outlet.

With self-threading shuttles, the construction is such that after the initial threading there is danger that the thread may get slack and unthread, break, or get tangled, particularly when the shuttle has gone into the receiving box on the side away from the magazine and. then has rebounded or when the shuttle is picked from that side of the loom because there is bound to be a considerable length of slack which may unthread, be curled up Or tangle up and cause flaws in the cloth or break until the shuttle is well into the shed of the cloth.

The purpose of our invention is to automatically take up some of the slack between the shuttle eye outlet and the bobbin no matter which way the shuttle is moving or how it stops.

We are aware that take up or shuttle tension devices have been patented as shown in-patent to'Shutt et al,, No. 1,723,424, of August 6, 1929, in which a pivoted arm works in a horizontal plane on a vertical pivot transversely; Cedarlund, No. 1,722,898 of July 30, 1929, in which an arm works in a horizontal plane on a vertical pivot longitu- 'dinally; Fuller, No. 2,023,678, of December 10. 1935, in which an arm or arms move in a vertical plane on a horizontal pivot, the arm extending "longitudinally; Rubin, No. 1,770,947, of July 22,

' laterally and Bufiington, No. 2,247,286, of June 24,

'l 94 l,who shows an arm which ispivoted at the 2 v a M bottom to swing in a horizontal plane on avertical pivot at the bottom of the thread slot but we believe we are the first to provide -a take up arm which can swing in a vertical-longitudinal plane with the pivot at the top from a point near the back or inward side of the eye outlet and-forward therefrom until it engages a stop, this take up arm being spring pressed or resilient so as to tend to move outward against the stop and taking the'place of the stationary vertical pin or similar stationary part generally used' to turn the thread at an angle from running longitudinally of the middle of the shuttle in the threading chamber out the eye in the side. 1

The horizontal pivot of our resilient arm is near the top of the block above the eye outlet and the arm extends down so that its free end can move freely in a substantially horizontal arc in a sector extending substantially from the bottom outward at an angle of not more than forty-five degrees. The free end of this arm should swing below the eye outlet and the thread as it passes through the eye outlet after threading. While there preferably is a stop to limit the outward movement of this free end, thespring construction can be such that its outward movement is limited.

Preferably our take up device is associated with friction plates at the back of the shuttle block and near the bobbin tip preferably suchas shown in the patent to Park, No. 2,087,607 and with a trap and outlet pins such as shown in patent to Gosselin, No. 2,426,449. T a

In the drawings: v

Fig. 1 is a plan view ofthe eye, forward or outward and of a shuttle with a shuttle block and other parts of our construction.

Fig. 2 includes an inside view at'the top and an edge view at the bottom of a take up arm.

Fig. 3 is a side elevation enlarged of a shuttle with our device, the shuttle being such as shown in Fig. 1 and parts being brokenaway to show the internal construction, the thread being shown as it would look when the shuttle is running away from the selvage edge of the cloth in what might be called an outward direction.

Fig. 4 is a side elevational view similar to 3 but with more parts broken away and with the thread in the position which it takes when and if there is slack when the shuttle has come to rest with its eye end away from the selvage of the with our take up arm in the position it is, caused to assume by its compression spring.

Fig. 6 is a sectional view as on the line 6--6 of Fig. l with the take up arm in substantially the same position as shown in Fig. 5. I

Fig. '7 is a view as from the bottom of a shuttle block with a take up arm such as shown in Figs. and 6.

Fig. 8 is a view similar to Fig. 6 but with a modified type of take up arm and eye outlet.

Fig. 9 is a view similar to Fig. 8 of a still further modification of a take up arm and of the eye outlet.

Fig. 10 is a side elevational view similar to Fig. 3 of a somewhat different type of outlet eye and diagonal threading passage with two partitions of a take up arm indicated.

Fig. 11 is a fragmentary view similar to Fig. 3 but showing the thread in the position it takes between the eye outlet pins and when the take up 7 arm has carried it outward. Fig. 12 is a diagram to show the position of the thread when a shuttle is travelling with its eye travelling through the cloth in the opposite direction from that shown in Fig. 12 and in dotted lines, the position it assumes when the spring of the take up arm has taken up the slack.

The drawings show a self-threading shuttle having a body A which is usually of wood or plastic with a threading block B together with a bobbin chamber 46 in which is a bobbin G on which thread H is wound and extending outward or forward from the bobbin chamber is a threading chamberC which is open at the top and from which laterally extends an eye outlet.

passage P to an eye outlet hole E in the side of the threading block B to an eye outlet 0 in the .body A of the shuttle.

At the outward end of the threading passage is 'theusual nose 26 and from this the front face 7 21 of the threading block B extends down to the eye outlet passage P, the back face 28 of the body A at the front of the recess 29 for the shuttle block being shown as extending a little over the front face 21 of the block to prevent unthreading.

v 'Thetake uparm T is mounted to swing in a ;vertical plane longitudinall of the shuttle on a pivot pin l at the top or near the top of the shuttle block at the junction of the longitudinal threading chamber andthe lateral outlet eye passage preferablyin a recess 1 in the shuttle block. At the outward end of recess 1 is a stop 6.

2 represents the free end of this take up arm and the arm itself is wide enough so that there can be a boss 4 made on the inward side whereby a spring 5 can engage that boss at one end, its other end entering a hole 3 at theothe'r or back end of the recess 1.

The take up'arm T is hung so that its free'end canswing in an are below the outlet eye hole E and if no thread is passing out the eye, it will be pushed by spring 5 up against the stop 6.

Preferably we use a construction between-the eye'hole E and eye outlet hole similar to what is shown in Gosselin Patent No. 2,426,449, wherein there is a trap shown herein as'M which includes a long back leg I l at the back and a short front leg l2 at thev front of the eye outlet hole E of the'shuttle bl0ck, there being pins 23 and 24 held by these legs. Preferably'we slope these pins from the bottom up and'towards each other so 4 that they will tend to guide the thread downward when passing out the shuttle eye in the Wood towards a cut away part l3 in the body of the shuttle which extends at I 5 up above the bottom end [4 of the front leg l2, the construction being such that the thread can pass down from the nose 26 between the faces 21 and 28, then under the front leg I2 and up at [6 into the eye hole E between the sloping front and back pins 23 and 24.

- We also prefer to use the friction plates F similar to those shown in the patent to Park No. 2,087,607,

comprising metal plates 30 and 3| with oppositely extending lips at the top forming a mouth at the top, the plates being mounted on a pin 32 and being spring pressed towards each other by springs 33. I

These friction plates F slope down and forward and also tend to keep the thread down as do the outlet pins 23 and 24. This is desirable because, as shown in Fig. 4 and Fig. 6, when at the extreme front swing the take up arm T might have a tendency to allow the thread to slip up but when thread H is held down as indicated, any such tendency is counteracted. f

In operation, after the transfer of a bobbin in the usual way, and after the threading through the eye holesE and O, the take up arm T takes the place of the usual center pin or verticalpin between the threading passage C and the eye outlet passage P but is constantly urged outward or forwardby its spring so that it is on the alert to take up any slack of any kind at any time and especially when the shuttle is in the box at either end of the lay.

Instead of using an arm on a pivot and with a separate spring, We may, as shown in Fig. 8, show a take up arm K which has a substantiallyrigid part 42 but is attached inside a suitable recess by means of a more elastic tail 4| or holding .stop to prevent the thread from slipping 01f the end or an arm such as X, Fig. 9, may have a regular holding hook 45 atits free end.

InFig. 11 is shown the trap'construction with pins 23 and 24which slope down away from each other and with the top rim I5 showing how the thread H is kept down whether the take uparm T is in the forward or outward or the back or inward position. These pins and the sloping plates of the friction plates F tend to keep the thread down andto overcome any tendency to slip up on the arm I when it is in the forward position.

Stop 6 at the outer'end and'36 at the inner end of recess 1 limit the movement'of arm T,

which is preferably so hung that ifthere was no spring, it would go down between the outlet pins 23 and 24. When the thread H is slack, arm T assumes the position shown in Fig. 4 and when the shuttle is going outward from the selvage of the cloth on themagazine side and the thread is passingaround pin 24, it willpull the arm back Y to thepositionfshown in Figs. 3 and 12 but when going back towards the 01f magazine-side and passing around front pin 23, it'will still be under tension from the spring 33. 'When the shuttle stops, the spring causes the arm to take up twice the amount of slack as the arc of movement of the arm. See diagrams Figs. 12 and 13. Arm T also takes the place of the center pin which in most shuttles causes the thread to pass at a right angle from the threading chamber out the threading passage and through the shuttle eye.

In Fig. 12 is shown diagrammatically the course of the thread H from the friction members F around arm T and then through an eye outlet E through pins 23 and 24.

When the shuttle is traveling toward the magazine side, the thread H will assume the position shown by full lines in Fig. 12, but when it is stopped in the shuttle box, if there is slack, it is taken up by the movement of arm T from the full line position to the dotted line position.

When traveling in the other direction, the thread H is traveling around the arm T as shown in the full line position and around pin 23 but when the shuttle strikes the picker on the off magazine side of the loom or when it starts back, the arm T wi l take up a certain amount of thread as it moves toward the dotted line position shown in Fi 13.

As shown in Fig. 10, our take up will work without the tran at the eye outlet and without any particular kind of friction plates. Fig. shows a shuttle of a well known type such as shown by Figs. 1 to 7, and 11 with a trap at the eye outlet.

The pivot point of an arm T or 6'5 can be placed higher or lower and forward orback, according to the type of automatic shuttle or as indicated in Figs. 8 and 9, it can be curved in Various ways to keep control of the thread.

We claim:

A self-threading shuttle having a body and a threading block with a longitudinal threading chamber open at the top and a lateral eye outlet passage extending at a substantially right angle therefrom to an outlet eye hole in the side of the block and an eye outlet in the body of the shuttle; a take up arm-mounted to swing longitudinally of the shuttle on a pivot which is positioned near the top of the shuttle block at the junction of said longitudinal threading chamber and the lateral outlet eye passage, said take up arm being resiliently movable so that its free end can swing in an are below the outlet eye hole against a stop in front of the eye hole, there being a trap including a long back leg at the back and a short front leg at the front of the outlet of the eye hole together with a cut away part in the body of the shuttle which extends up above the bottom end of the front leg,v whereby the thread can move; down around the bottom of the front legand up into the eye hole in the metal which outlet eye hole, is positioned above the bottom or free end of the take up arm.

JAMES E. SEGEE. WILFRID J. GOSSELIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

